Close Alternative — 70.6% match
based on chemical composition and mechanical property overlap.
GOST 4543 40X (GOST 4543-2016) and GB/T 3077 40CrNi (GB/T 3077:2015) are both steel grades.
Both fall under the Alloy Steel category.
GOST 4543 40X is typically used for gears, shafts, axles, spindles, studs, automotive components, while GB/T 3077 40CrNi is commonly used for hot-rolled or forged structural alloy steel bars.
GB/T 3077 40CrNi is defined under Guobiao Standards (GB/T) (China).
As per chemical composition, GOST 4543 40X vs GB/T 3077 40CrNi is a 81% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 70.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
GOST 4543 40X
GB/T 3077 40CrNi
Tensile Strength
980-1180 MPa
>=980 MPa
Yield Strength
>=785 MPa
>=785 MPa
Elongation
>=10%
>=10%
Hardness
229-285 HB
<=241 HB
Condition
Not specified
Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Can GOST 4543 40X Be Substituted With GB/T 3077 40CrNi?
GOST 4543 40X and GB/T 3077 40CrNi are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between GOST 4543 40X and GB/T 3077 40CrNi?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 4543 40X be substituted with GB/T 3077 40CrNi?
GOST 4543 40X and GB/T 3077 40CrNi are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.